Tool-holder.



E. SCHLEGL. TOOL HOLDER.

APPLICATION FILED MAY I6, 1917.

Patented J lll le 11, 1918.

2 SHEETS-SHEET I.

INVEAITOR inn- Z OcZ/? Mramm' l E. SCHLEGL.

TOOL HOLD-ER.

APPLICATION FILED MAY 16. I917.

1,659,317. Patented June 11, 1918.

2 SHEETS-SHEET 2.

EMRIGH SCI-ILEGL, OF ASTORIA, NEl/V YORK.

TOOL-HOLDER.

Specification of Letters Patent.

Patented June it, Minis.

Application filed May 16, 1917. Serial No. 169,074.

To all whom it may concern:

Be it known that I, EMRIoH SCHLEGL, a citizen of Austria-Hungary, and resident of Astoria, Long Island, in the county of Kings and State of New York, have invented certain. new and useful Improvements in Tool- Holders, of which the following is specification.

The present invention relates to improvenients in tool holders, and particularly such tool holders for supporting cutting tools used in metal working machinery, such for instance as lathes.

An object of the present invention is to provide an improved universal shank in which the various tools required upon said machines may be held in their proper working positions. To this end I propose to provide means by which the tools may be held in a very ri id manner, at the same time permitting of certain tools having a slight amount of vibration, such action being desirable in certain kinds of work, such for instance as in nurling, thread cutting, and other such operations which are well known to those skilled in the art.

A further object of the invention is to provide an improved spring attachment for tool holders, so designed as to accommodate a va "iety of tools. Other objects are to provide means to permit of the ready removal and adjustment of the tools so that the proper working angles and positions may be quickly and accurately determined, thereby resulting in more uniform and quicker work.

vVith these and other objects in view, an embodiment of my invention is shown in the accompanying drawings, and this embodiineut will be hereinafter more fully de scribed with reference thereto, and the invention will be finally pointed out in the claims.

in the accompanying drawings;

Figure 1 is a perspective view of my improved universal shank;

Fig. 32 is similar view with a portion of the shank broken away, and showing the reversed side thereof;

Fig. 3 is a sectional view through the shank, and showing one form of tool holder secured therein;

Fig. 3 is a plan view of the retaining nut;

Fig. 4 is a view of the inner side of the tool holder shown in Fig. 8, detached from the shank;

F 5 is a side view showing the same same in another operating attached to the shank, and showing in dotted lines another working position thereof;

Fig. 6 is a side elevation of a nurling head formed according to my invention, the shank being shown in broken lines;

Fig. 7 is a view of the inner side of the nurling head, showing the same detached from the shank;

Fig. 8 is a plan View thereof attached to the shank;

Fig. 9 is a view partially in section and partly in elevation of a boring bar and boring bar holder formed according to my invention, and shown secured to my improved universal shank;

Fig. 10 is a plan view thereof;

Fig. 11 shows another operating position of the same, from that shown in Fig. 10;

Fig. 12 is a perspective view of my im proved shank with parts broken away and showing a modified form of holder attached thereto;

Fig. 13 is a plan view of the holder shown in Fig. 12;

Fig. 14; is a view of the inner side thereof;

Fig. 15 is a detail view, showing the spring employed;

Fig 16 is a detail of a retaining nut adapted to be attached. to the spring shown in Fig. 15;

Figs. 17 and 18 are detail views of a clamping block;

Fig. 19 is a plan view block shown in Fig. 17

Fig. 20 is a perspective View of a form of the clamping of my "invention shown in detail in F igs..

12 to 19, and showing the same supporting a thread cutting tool;

Fig. 21 is a plan view of the form shown in Fig. 20;

Fig. 22 is a perspective view showing the position, and supporting, a special forming tool;-

Fig. shows the type of work formed by the construction shown in Fig. 22, and

Fig. 24 is a perspective view showing the same supporting a cutting off or parting tool.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, and more particularly to Figs. 1 and 2 thereof, my improved universal shank comprises a head 25 provided with an opening 26 therethrough and-having a shank portion 27 extending therethrough and being in an inclined plane thereto, the said shank portion being rectangular in cross section as is usual with such tool holders. The front face of the head 27 is provided adjacent the shank 27 with a wall 28, the inner side of which is in the form of a portion ofa circle, the forward edge of the head also being in line with the same circle as at 29. Retaining pins 30 and 31 are provided in the head at each side of the opening 26, and slightly spaced from the wall 28 of the edge 29. The rear face of the head is beveled at its forward edge as at 32, and is provided with a substantially circular bearing surface 33 which is engaged by a retaining nut hereinafter referred to.

The tool holding block shown in Figs. 2 to 5 is substantialy rectangular in cross section, and is of slightly less width than the width of the head of the shank and is provided at each side thereof with flanges 35 and 36 of triangular form, the opposed sides of the two flanges being parallel to each other, and so spaced as to be in alinement with the edges of the head of the shank in the two positions of the block, as shown in Fig. 5. A squared passage 36 is provided, extending through the block, in which is disposed the too]. 37 which is provided at each end with cutting portions, and which may if desired be of two types of tools, that is one end may have the shape of the well known cutting tool, and the other end may be in the form of a finishin g tool.

A central screw threaded shank 38 is provided on the under side of the block 34-, and is adapted to be inserted through the opening 26 of the head of the shank 27, a retaining ring 39 being screwed thereon, and bearing against the surface 33 of the head, and fastening the block securely in place. Diametrically opposite niches or recesses 10 or other suitable means are provided in the ring to permit tightening of the same by means of a suitable wrench, after it is first threaded upon the shank by hand. In order to retain the tool securely within the block, the shank 38 is provided with a bore 41 extending through the same to the squared assage 36. The outer ortion of the bore P e P is interiorly threaded. and on the inner portion there is provided a plunger 42 held in place by means of a plug 43 threaded into the bore and bearing against the under side of the plunger. A hexagonal or otherwise suitable shaped recess A l is provided in the plug 43 so that the same may be readily turned by means of a suitable key or wrench. 'The forward end of the plunger 12 is beveled as at 415, and engages the tool, the inner edge of the bore being provided with a small inwardly extending rim 416 which engages the beveled portion .15 to prevent the plunger from dropping into the passage 36. It will be seen that by screwing the plug 43 inwardly, the tool will be securely held in the passage, and upon loosening the plug it may be readily removed.

At each side of the shank 38 there are provided circular recesses 17 and 48 corresponding in position to the pins 30 and 31 of the head, so that the diametrically op posite recesses may engage the said pins and thereby prevent rotary movement of the tool holding block. As shown in Fig. 5, the engagement of the recesses A8 by the pins 30 and 31 will retain the block in an angular position with respect to the shank 27, this position being a predetermined working position which is desirable for the character of work for which the present invention is de signed. In this position it will be seen, the opposed edges of the flanges 35 and 36 are flush with the edges of the head 25. As shown in dotted lines in Fig. 5, by loosening the ring 39 so as to permit of the block being raised out of engagement with the pins, the same may be turned so as to bring the other end of the tool 37 into position, the recess 17 in this case being engaged by the pins 30 and 31.

In Figs. 6 to 8, I have illustrated my invention as embodied in a nurling head which comprises a block 50, substantially the shape of the head 25, and laterally recessed as at 51, and nurling wheels 52 being rotatably mounted in the said recess. At one end of the head, these nurling wheels may be of large gage, while at the other end they may be of finer gage so that different kinds of nurling may be carried out.

A threaded shank 53 is provided at the under side of the block 50, and is adapted to engage the head 25 to be secured thereon by means of a retaining ring 545. At the sides of the shank 53, and positioned relatively to the pins 30 and 31, there are provided recesses 55 and 56 which are substantially elliptical shape so that the head is not held rigidly upon the shank as in the case of the form shown in Figs. 3 to 5, but a slight vibration of the same is permitted. This is desirable in nurling, as the work is not always concentrically placed in the lathe, and it is necessary to allow a slight play. It will be understood that when it is desirable to bring a new nurling surface into operation, it is only necessary to loosen the ring 54, permitting disengagement of the pins 30 and 31, and turning the block through an arc of 180.

In Figs. 9 to 11, I have shown my invention as applied to a boring bar holder. The holder comprises a block 60 of substantially rectangular shape, preferably square in cross section. The lower portion of the block is provided with a circular flange 61, which is adapted to fit the head 25. A screw threaded shank 62 is provided on the under side of the block 60, and is adapted to be engaged by a retaining ring 63. A plug 6a and plunger 65 similar to that shown in Figs. 3 to 5 is provided in the shank 62 the boring bar 66 in the passage 67 of the block. Four radially disposed circular recesses 68 are provided upon the under side of the flanged portion 61, the said recesses being equally spaced apart and the diametrically opposite recesses adapted to engage the pins 30 and 31 of the head 25. Thus it will be seen the boring bar may either be held in alinement with the shank, as shown in Fig. 10, or may only be held at an arc of 90, as shown in Fig. 11. In the first case the bar is used for boring work, and in the latter, may be used for such work as cutting a key Way.

In Figs. 12 to 24, I have illustrated an embodiment of my invention in which I provide a spring tool holder adapted to be secured to my improved universal shank. This embodiment comprises a block member 70, having one arcuate face 71 adapted to abut the wall 28 of the head 25, and provided in the under side thereof with a recess 72, which engages the pin 31 of the head. A circular passage 73 is provided through the block 70, one corner of the said block being rounded as at 74, and in circumferential relation to the passage 73, and at right angles to the said passage, and on the under side of the block there is provided a threaded shank 75 in which there is disposed a plug 76 and plunger 77, such as that shown in the form of my invention illustrated in Figs. 3 to 5, and which are adapted to secure a goose neck spring member 78 in the said passage 73.

The block 70 is secured to the universal shank by means of a ring nut 79. The spring member 78 is of relatively large diameter, and provides a substantially stiff spring. One leg of the spring member 78 is of re duced diameter as at 80, and is screw threaded at its end portion, and provides with the main portion of the spring a shoulder 81.

Clamping blocks 82 and 83, shown in Figs. 17 to 19, are providedwith passages Stand 85 therethroughrespectively, the passage 84 being enlarged as at 86 at its upper portion so as to engage the shoulder 81 of the spring. These blocks are provided in their opposed faces with cooperating recesses 87 and 88, 89 and 90, the end Walls of the said recesses 87 and 88 being inclined or beveled so as to form a dove-tail connection with the tool,

as hereinafter pointed out. These recesses, it will be understood, may be of any cesircd size or shape to accommodate the tool to be held therein.

In operation the clamping blocks 82 and 83 are placed upon the reduced portion 80 of the spring, and are tightened against the shoulder 81 by means of a ring nut 91 which engages the threaded end of the said portion be noted, for securing 80. The one side of the said blocks, it will abuts against the projecting end of the head 25, while at the other side the blocks may be swung, upon loosening of the spring 78, and by removing the nut 91 the blocks may be dropped from the spring and their position changed to accommodate various working tools, as hereinafter pointed out. Various sized tools may be accommodated by reason of the aXial adjustment per- 75 mitted by the sliding lower block 83, and the nut 91, which engages the under side thereof. In Figs. 20 and 21, I have shown this embodiment of my invention supporting a thread cutting tool 92, the recesses 89 and 90 in this case being parallel to the head 25, and the opposed faces of the block abutting against the pin 30. It will be noted from Fig. 21 that the strain of cutting the thread which is desirable in this character of work,

while the support of the tool at the side by means of the head 25 prevents any lateral vibration which is very undesirable in such work, and which often results in the cutting of unsatisfactory screw threads.

In Fig. 22, I have shown this embodiment of my invention as employed for supporting a special forming tool. The blocks in this case are turned so that the recesses 89 and 90 are at right angles to the head 25, and the forming tool 93 is inserted therein. Fig. 23 illustrates the type of work that may be carried out by such a tool. In Fig. 2 1, I have shown the tool holder in position for supporting a parting or cutting off too] 94.

In this case the recesses 87 and 88 are turned into parallel relation with the head It 195 will be understood that other forms of tools may be employed than those illustrated, and also the tool holder may be used on other machines than lathes, such for instance as planers or other similar metal working machines. This type of tool holder is especially proficient in working upon bron /le, cutting threads, gages or the like, as will be understood by those skilled in this art.

I have illustrated preferred and satisfactory forms of my invention. but it is obvious that changes may be made therein within the spirit and scope thereof, as defined in the appended claims.

claim:

1. An in'iprovcd tool holder comprising a shank, a head provided with an opening therethrough, an arcuate abutment wall at the rear of said head, a block member adapted to support a tool, and provided with a circumferential engaging portion, the said abutment wall adapted to engage said circumferential engaging portion, said abutmentwall adapted to resist working strains on the tool, means for securing the said block to the said head, and immovable pins on one of saidmembers spaced from said abutment wall, the sides of said pins being perpendicular to the surface of said mem her, the other of said members being provided with a socket having its sides perpen dicular to the surface of said member, and adapted to be engaged by said pins to form a connection thercbetween against rotation.

2. An improved tool holder comprising a shank, a head provided with an opening therethrough, an arcuate abutment wall at the rear of said head, a block member adapted to support a tool, and provided with a circumferential engaging portion, the said abutment wall adapted to engage said circumferential. engaging portion, said abutment wall adapted to resist working st 'ains on the tool, means for securing the said block to the said head, and diametrically opposite immovable pins on one of said members respectively adjacent and spaced from said abutment wall, and spaced from and adjacent the outer end of said head, the sides of said pins being perpendicular to the surface of said member, the other of said members being provided with sockets at fixed predetermined points, the sides of said sockets being perpendicular to the surface of said member, and adapted to be engaged with said pins to form a connection therebetween against rotation.

3. An improved tool holder comprising a shank, a head provided with an opening therethrough, an arcuate abutment wall at the rear of said head, a block member adapted to support a tool, and provided with a circun'lferential engaging portion, the said abutment wall adapted to engage said circumferential engaging portion, said abutment wall adapted to resist working strains on the tool, means for securing the said block to the said head, an immovable pin on said head adjacent and spaced from said abutment wall, and of a height substantially equal to the height of said wall and having its sides perpendicular to the surface of said head, and an interior cut out portion in said block having its sides perpendicular to the surface of said block and adapted to be engaged by said pin to form a connection therebetween against rotation, said pin adapted to resist side working strains on the said tool in either direction.

l. An improved tool holder comprising a shank, a head provided with an opening therethrough, an arcnate abutment wall at the rear of said head, a block member adapted to support a tool, and provided with a circumferential engaging portion, the said abutment wall adapted to engage said circinnferential engaging portion, said abutment wall adapted to resist working strains on the tool, m ans for seci'lring the said block to the said head, and immovable pins on one of said members spaced from said abutment wall, the sides of said pins being perpendicular to the surface of said member, the other of said members being provided with a socket having its sides perpendicular to the. surface of said member, and adapted to be engaged by said pins to form a connection therebeltween against rotation, and means adapted to perinit vibratory movement of said tool. a

5. In a tool holder, a shank, a spring support supported at the end of said shank, and tool holding means rotatably supported on said spring support, means for securing said tool holding means against rotation, and a plurality of tool engaging portions on said tool holding means adapted to be moved into position to support different working tools.

6. A tool holder comprising a shank, a head on said shank, a block, means securing said block to said head, retaining means adapted to prevent rotary movement of said block, a spring support siupported by said head, and tool holding means carried by said spring support.

7. A tool holder comprising shank, a head on said shank, a block, means securing said block to said head, retaining means adapted to prevent rotary movement of said block, a spring support supported by said head, and tool holding means carried by said spring support, said head supporting said-tool holding means laterally, said tool holding means adapted to have vibratory motion through said spring support.

8. A tool holder comprising a shank, a

head on said shank, a block, means securing said block to said head, retaining means adapted to prevent rotary movement of said block, a spring support rotatably supported by said block, means for securing said support against movement, and tool holding means carried by said spring support.

9. A tool holder comprising a shank, a head on said shank, a block, means securing said block to said head, retaining means adapted to prevent rotary movement of said block, a spring supportsupported by said head, and tool holding means rotatably supported on said spring support, means for securing said tool holding means against rotation, and a plurality of tool engaging portions on said tool holding means adapted to be moved into position to support different working tools.

10. A tool holder comprising a shank, a head on said shank, a block, means securing said block to said head, retaining means adapted to prevent rotary movement of said block, a spring support supported by said head, and tool holding means carried by said spring support, the strain on the tool being in a line extending from the point of said tool through said spring support and said shank. i i

11. In a tool holder, a shank, a supporting post at the end of said shank and tool holding means, comprising a pair of tool clamping members disposed 011 said post, having cooperating tool engaging portions, said post adapted to limit the movement of one of said members, and means on said post adapted to move and retain the other of said members into clamping relation With said first mentioned member, said relation being adjustable to accommodate different sized tools.

12. In a tool holder, a shank, a supporting post at the end of said shank, and tool iolding means comprising a pair of tool clamping blocks having adjacent and cooperating tool engaging portions, said blocks having openings therein adapted to be engaged with said post to permit of movement of said blocks axially of said post, said post adapted to limit the movement of one of said blocks, and means on said post adapted to move and retain the other of said members into clamping relation With said first mentioned member, said relation being adjustable to accommodate different sized tools.

13. In a tool holder, a shank, a supporting post at the end of said shank, and tool holding means comprising a pair of tool clamping blocks having adjacent and cooperating tool engaging portions, said blocks having openings therein adapted to be engaged with said post to permit of movement of said blocks axially of said post, said post being provided with a shoulder adapted to limit the movement of one of said members, and a tightening nut on the end of said post adapted to move and retain the other of said members into clamping relation With said first mentioned member, said relation being variable to accommodate different sized tools.

14. In a tool, a shank, a supporting post at the end of said shank and tool holding means, rotatably supported on said post, means for securing said tool holding means against rotation, and a plurality of tool engaging portions on said tool holding means adapted to be moved into position to support different Working tools, said respective tool engaging portions being adjustable to accommodate different sized tools.

In testimony, that I claim the tloregoing as my invention, I have signed my name in 55 presence of two subscribing Witnesses.

EMRIGH SCHLEGL.

Witnesses:

D. LEWIS NA'ITERN, AGNES Y. CoRIGAN.

@opiea of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

